/Engine/Plugins/FX/Niagara/Source/NiagaraEditor/Public/NiagaraParameterMapHistory.h
Is this parameter in the special "Engine" namespace?
namespace FNiagaraParameterUtilities { bool FNiagaraParameterUtilities::IsEngineParameter ( const [FNiagaraVariable](API\Plugins\Niagara\FNiagaraVariable) & InVar ) }